20430344511 has 6 divisors (see below), whose sum is σ = 29510497640. Its totient is φ = 13620229668.

The previous prime is 20430344503. The next prime is 20430344587. The reversal of 20430344511 is 11544303402.

It is a happy number.

20430344511 is a `hidden beast` number, since 204 + 3 + 0 + 3 + 4 + 451 + 1 = 666.

It is not a de Polignac number, because 20430344511 - 2³ = 20430344503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20430344591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1135019131 + ... + 1135019148.

Almost surely, 2^20430344511 is an apocalyptic number.

20430344511 is a deficient number, since it is larger than the sum of its proper divisors (9080153129).

20430344511 is a wasteful number, since it uses less digits than its factorization.

20430344511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2270038285 (or 2270038282 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 20430344511 its reverse (11544303402), we get a palindrome (31974647913).

The spelling of 20430344511 in words is "twenty billion, four hundred thirty million, three hundred forty-four thousand, five hundred eleven".